Double-acting deep-well pump.



W. B. ERB.

DOUBLE ACTING DEEP WELL PUMP.

APPLICATION FILED JAN. 7, 1011.

1,063,669, Patented June 3, 1913.

' OUBL -Lorine DEEP-WELL PUMP.

Specification of Letters Patent.

Patented June 3, 1913..

minim mega January 7,1911. Serial No. $01,276.,

To b1! 'w homitrrh ay concern; p Be it known that I. \VILLIAM B. Eire, a

citizen of the United States, residing at Chicago, inthe county of Cook .andStateof Illinois, have invented certain new and use.- ful Improvements in Double-Actmg-Deep We'll-Pumps, of. which thefoll'owing is a;

specification, reference being; had toithcqac conipanying drawings, torming a. patjt thereof;

The purpose. of this inventionzis to pm vide an; improved double-acting'pump for deep wells, its specificfeatures-be-ing designed-to afl'ord relatively large. capacity-for a given bopeand to es. through ut. jIt consists of the permit the use of hall elements described and .shown in the drawings as, indicated-in the claims.

j In the-drawings: Figure-1" a/inedial section of a pumpembodying this.invenfie'd form ofthe invention'. Fig. G'iS'fi dG- tion. Fig. 2 is a section .at the line 2+2 on Fig. 1. Fig. 3 is a section at the l-1ne '3- -3 on Fig. 1; Fig.4 is a section at the line 4. 4 onFig. 3. Fig. 5 isa medialsectlon taken similarly to Fig. 1, but illustrating-amoditail section at the line Hon Fig; 1'.

As illustrated in the drawings, the pump consists of. an outer shell or casing, 1 1, 8;- pump cylinder, 2, contained -.'-.-\'vi-thin 1 saidshell, and fa piston, 3, 'niountediormove- 4 'nient, within the cylinder, together with certam cooperatin' valves, as hereinafter described. Into t e lower end-of tbecasing- .there -'.is threaded a fitting comprising an onter'shelL t, an interiorlysupported housmember: 6",.andthe balk-6". The-interior ing, 5, audit ball valve consisting of the seat of theh'ousing .5, communicates with: the

exterior of the shell, 4, through passage-1 ways, 5",iwhic'h open out of 'said "shellabove its threaded connection to the outer casing;

1, find communicates also' with thechamber.

7,-.bet ween the housing and the shell through the port, 6, of the hall valve. "*-This chamber,-

7, is provided at its upperend withga port,

8, -,clo'sed by a valve ball,- 9 ,"contain'ed iii the v 1housing, 10, the said housing being aper 7 interior .of the pump cylinder, 2. This. housing, as is clearly show u in the drawings. 7

tured at 10. vforcommunication with the Y constitutes the support for the lower end of the pnmpcylinder which is threaded to it 'wv- 1 v The piston consists of a, plunger casting,

.thep

int/ween itand the outer casing, 1.

l1, dimensioned to slide within the .pump cylinder. 2. and fitted with suitable piston rings, 11. and packing rings 11". This plunger is a hollow casting having a chamher. it, opening into the pump cylinder through a port .-.ll. which is fitted with a .hall alvte, 12. Guides. 1'., for the ball are shown projecting from the interior wall of I the chamber. 11", and a stop'in the form of a bridge, 12", castin the chamber, is'provided. to limit its vertical movement... Con-t pecting the piston plunger with its operatlng'piston rod, there isshown'a fitting comprising an outer shell, 13, having a port,

13, opening into the chamber ll", of the piston.- A transverse conduit, 13, leading from .ide to side ,of this fitting just above 1.3,communicates withthat portion of the interior of the cylinder, 2, which is above the piston, and being provided with an. aperture..13, in its upper side, this conduit may also communicate through the'bypasses. 13, and the port, 13, with the interior of. the piston. The aperture, 13 is controlled by a ball valve. 14. for which are 'provided lateral guides, 14. and a limit stop, 14f, supported from the shell, 13. Near the .top of the pump: cylinder are shown a numberof openings, 21, which atcommunicating through the shell, 13, with the interior of the piston chamber, 11", and

thekactual discharge of the pumpv is effected through this hollow piston rodj Above the pump, the rod may consist merely of a secoupled together to form an operative conn'ection with the pump. For-guiding such a piston rod within the pipe'of the well, a. spider,'16', is provided, and adjoining sections of the piston 'rod or pipe are screwed into each end of the hub. but not abutting, so that a discharge opening isleft between -th'em, the spider being' correspondingly apcrtured. as at 16.

The principal'elcments and features of ries of pipe sections (if-convenient length construction having been. described, the

operation of the pump will now'he recited. As the piston,11, rises from its'lowest position, as shown in Fig. 1, a partial vacuum fill the .chamber, 11,

in the lower portion ofthe pump cylinder, 2, is created, permitting the ball, 9, to become unseated, and causing the water to be sucked up through the-chamber, 7, port, 8, and opening, into'the lower partaof said cylinder. For a reason hereinafter explained, the ball, 6 will remain seated during this operation, as will also the valves, 12 and 14,

As the piston descends, the valve,'12, will be unseated, allowing the water in the cylinder, 2, to enter through the port, 11"., and

within the piston. At the same time, a partial vacuum being created in the upper portion of the cylinder, 2. and in the chamber, 1, between said cylinder and the casing, 1, by virtue of the apertures, 2, connecting it with the cylinder, the ball, 6", will rise from its seat, 6, and the water will be drawn up through the port, 6, and passageways, 5", into the chamber, 1'. It is the pressureof this water which tends to hold the ball, 6", to its seat during the rise of the piston. Durin' the j ne'xt rise of the piston, more water will be drawn into the cylinder,

2, throu h the port, 8. exactly as alreaddescribed in the caseof the first upstrol e. As the piston descends, this water in the lower portion of the cylinder, 2, will enter the piston chamber,

; 11, displacing the wateralready-contained therein and forcing it up through the port, 1. and bypasses, 13, into the hollow piston-rod, 15. while the ball, 14, will act as a check valve to prevent the water from flowing back-through theaperture, 13, and conduit, 13*, into the upper part of the pum cylinder. At the same time, this down stroke will draw morewater through the port, 6, into the chamber, 1, and will increase the quantityalready there present sufiiciently to cause it to overflow through the apertures, 2, into the upper part of the pump cylinder. With the ball, 6", acting as a check valve during the Lip-stroke of the piston, the water in this upper portion of the cylinder. can escape during said upstroke only through the conduit, '13, andpast. the ball valve, 14, up into the hollow piston rod, 15. Thusit. will be seen that the rlown-stroke and the-upstroke of the piston both cause discharge of water up through the piston-rod, 15, said discharge coming from the piston chamber, 11, during the down-stroke and from the pump cylinder, 2, during the lip-stroke. As implied in the description of parts, the final discharge is effected through theapertures, 16", in the piston rod guides. the. well pipe above the pump being gradually filled in this way until the water discharges at its upper end.

When ihis form of pump is built in com paratively large sizes, it is found that metal balls of the same relative dimcnsions as those used in the smaller sized pumps tend to hammer and wear themselves and their conduit, 7.

' 11K er,

.of the same outside valve seats too rapidly because of their increased mass; and it is therefore desirable to .use smaller balls of the same size as those pumps. To accomplish this, the two lower valves of the structure are made in multiple. as shown in Fig. 5, necessitating a slightly different structural design of the fittings. The lower fitting, 4, is provided with several ports, 6-, corresponding to the port 6 of the other form, and the chamber, 7, is replaced by a central Instead of thehousing, 5, lateral guide posts, 5,- for the balls are shown in this form supplemented by caps, 5', to limit the lift of the valves. The-function of the pas ageways, 51in affording communication with the chamber, 1', is performed in this larger style by the spaces between theposts, 5-, and between the caps, 5. Passing. to the upper valve, we find a plurality of ports, 8, corresponding to the port, 8, andcontrolled by ball valves, 9, whichare carried in guideslsimilar to those provided for the lower ball valves and consisting of side posts, 10, and caps, 103', in place-.of the housing, 10, shown in Fig. 1. These ball ca es stand practically within the pump-cyl- 2,and communicate with it through the spaces between their side posts and caps, instead of through a special aperture such as that shown at 10 in Fig. 1. In the piston itself, a different expedient is employed to avoid the use of large metal balls,- namely, the substitution of a rubber ball 12 in place of that shown at 12 in Fig. 1. To prevent this ball from becoming misshapen or unnecessarily worn at' the line of contact with its seat, a cradle 12 is cast in the fit,- ting, positioned to limit the downward mdvement' of the ball in becoming'scated. Preferably this cradle is made to conform-to the curve of the ball, as is also the upper stop 12'. An exactly similar substitution is made in the case of the upper valve 14, not shown in Fig. 5. Lateral guides and upper stops are provided for both. in the small form, and all other details of the constructioii are substantially similar to those shown in Fig. 1.

In addition to the features above described, there is shown a shifting culiar construction. The outer part, 17, is diameter as the pump casing, 1, but is reduced and threaded at its lower end for connection with the said casing. The upper end is interiorly threaded and coupled to the lower end of the well pipe, while the middle port-ion is conically lml'tt'l to receive the tapcrcd-mcmbcr 18. 'lhc lattcr is centrally apcrtured to admit the piston rod 15, and through most of its length the aperture is enlarged to contain also a packing ring 19, and the third metal part 20. which is screwed into the member 18 in position to secure the packing ring 19.

valves just as To insure absolute tightness the taper joint, a groove is formed in the member 18, and filled with parking 21 which is kept moist at all times through small ducts 18 in the member 18 leading from the interior of the pump cylinder.

' I claim:

1. In a doubleacting pump, the combination of a cylinder: a hollow pistonmounted for travel therein;ra hollow piston rod' the cylinder having supply ports above and below therange of travel of the piston; check valv'es controlling the supply through said ports respectively; the piston having a portfor inlet from the interior of the cylinder below the piston, and a check valve for said port; a fitting interposed between the piston and the piston rod comprising an exterior shell; a conduit supported transversely within the shell, the shell having. apertures communicating With the interior,v of the piston and the interior of the piston rod at its lower and upper ends respectively; the conr duit having an upwardly opening port; and a checlnvalve controlling the same.

- 2. In a double-acting pump, a hollow pisr ton-rod having a discharge opening, a guide for said rod comprising a spider having extended segmental arms, and having its hub apertured coincidently with the opening in the piston-rod.

3. In combination with a double-acting pump comprising a pump cylinder, 2, piston and an actuating pump rod, a stufling box comprising an outer member secured to the pump cylinder and having a conical bore, an inner member eXteriorly tapered to fit said conical bore and interiorly bored to admit the pump rod, and at the said inner member having aeircumferential groove in its tapered surface and a packing ring lodged in said groove.

In testimony whereof, I have hereunto set my hand, in the resence of two witnesses,

at Chicago, Illinois, this 5th day of January, 1911.

W. B. ERB. \Vitnesses:

M. GERTRUDF, ADY, JEAN ELLio'rr. 

